ILLINOIS POLLUTION CONTROL BOARD
    February
    6,
    1975
    )
    )
    IN THE MATTER OF WATER
    )
    POLLUTION REGULATIONS
    )
    R73-3
    REVISIONS
    )
    R73-4
    )
    ORDER
    OF
    THE
    BOARD
    (by
    Mr.
    Dume lie):
    On
    March
    8,
    1973
    the
    Environmental
    Protection
    Agency
    filed
    with the Board proposed regulations dealing with Rules
    404(f)
    (ii),
    406, and 602(c) (3)
    of the Water Pollution Regulations.
    These were designated R73-3 and published in Newsletter No. 62
    on March 19, 1973.
    An allied proposal. for a new Rule
    409 was
    designated R73-4 and published at
    the same time.
    Hearings were held on April
    18, 1973 in Chicago and April
    24, 1973 in Peoria.
    On July 19, 1973 the Board entered an
    order enacting Rule 409 and Rule 602(c)(3),
    The proceeding
    was left open for further action on Rule
    406
    (ammonia nitrogen).
    The basic document entered
    (Ex.
    7)
    in this proceeding was
    the “Report on Ammonia and Inland Fisheries” dated 1970,
    published by the European Inland Fisheries Advisory Commission
    (EIFAC)
    Working Party on Water Quality Criteria.
    Since
    that
    time
    a new document has been issued by the United States
    Environmental Protection Agency which bears upon the possible
    use of un-ionized ammonia levels as
    a water quality standard
    in lieu of the present Illinois total ammonia standard.
    The new book “Water Quality Criteria 1972” written by
    the National Academy of Science and the National Academy of
    Engineering was received by the Board in November 1974.
    The
    U.S. Environmental Protection Agency notes that
    a final draft
    of the report on water quality criteria required by Section
    304(a)
    of P.L. 92-500
    (the Federal Water P llution Control
    Act)
    will be completed in February 1975 and published in
    June
    1975.
    It
    is highly desirable that the Board take advantage of
    the latest scientific findings.
    This
    cause
    is therefore
    15
    —
    423
    —2—
    terminated and a new proceeding will be initiated if the new
    reports indicate a basis
    for change.
    Materials and testimony
    developed in this proceeding can be incorporated into
    any future cause.
    This proceeding is terminated.
    IT IS SO ORDERED.
    I, Christan L. Moffett,
    Clerk of the Illinois Pollution
    Control Board, hereby certify the above Orde~rwas adopted on the
    ~
    day of
    February, 1975
    by
    a vote of
    4/~0
    C ristan L.
    o
    e
    ler
    Illinois Pollution
    ntrol Board
    —
    424

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